SN74CBTK32245 Datasheet, PDF (1/10 Pages) Texas Instruments – 32 BIT FET BUS SWITCH WITH ACTIVE CLAMP UNDERSHOOT PROTECTION CIRCUIT

SN74CBTK32245
32ĆBIT FET BUS SWITCH
WITH ACTIVEĆCLAMP UNDERSHOOTĆPROTECTION CIRCUIT
SCDS106E − APRIL 2000 − REVISED SEPTEMBER 2003
D Member of the Texas Instruments
Widebus+ Family
D 5-Ω Switch Connection Between Two Ports
D TTL-Compatible Input Levels
D I_off Supports Partial-Power-Down Mode
Operation
D Active-Clamp Undershoot-Protection
Circuit on the I/Os Clamps Undershoots Up
To −2 V
D Flow-Through Architecture Optimizes PCB
Layout
D Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
D ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
− 1000-V Charged-Device Model (C101)
description/ordering information
The SN74CBTK32245 provides 32 bits of high-speed TTL-compatible bus switching. The low on-state
resistance of the switch allows connections to be made with minimal propagation delay.
The A and B ports have an active-clamp undershoot-protection circuit. When there is an undershoot, the
active-clamp circuit is enabled and current from V_CC is supplied to clamp the output, preventing the pass
transistor from turning on.
The device is organized as four 8-bit bus switches, two 16-bit bus switches, or one 32-bit bus switch. When the
output-enable (OE) input is low, the switch is on and port A is connected to port B. When OE is high, the switch
is open and the high-impedance state exists between the two ports.
This device is fully specified for partial-power-down applications using I_off. The I_off circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
LFBGA − GKE
−40°C to 85°C
LFBGA − ZKE (Pb-free)
Tape and reel
SN74CBTK32245GKER
SN74CBTK32245ZKER
KT245
† _{Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are}
available at www.ti.com/sc/package.
FUNCTION TABLE
(each 8-bit bus switch)
INPUT
OE
FUNCTION
L
A port = B port
H
Disconnect
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Widebus+ is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright  2003, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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